The text is divided into three parts; part one discusses the diseases of the dental tissues, and part two those of the oral mucous membrane. Part three is quite brief and contains outlines and directions for student use in the laboratory. As suggested in the title, the author covers both the diagnosis and the treatment of these diseases. In addition, there is considerable material on both etiology and pathology, and this last statement is especially true of the chapters on caries and pulp canal therapy. On the whole, the discussion of the various diseases is conventional, the only exceptions concerning matters in which the author has been actively interested, as, for example, the relationship of salivary composition to the incidence of caries. Even in such instances, the views of others are carefully presented. Each chapter is followed by an extensive bibliography, which, however, is not directly connected with the subject